Why abstract methods are used?

The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from another class). Abstract method: can only be used in an abstract class, and it does not have a body.

In Python, abstract base classes provide a blueprint for concrete classes . They don’t contain implementation. Instead, they provide an interface and make sure that derived concrete classes are properly implemented. Abstract base classes cannot be instantiated.

What is the Use of Abstract Method in Java? In any programming language, abstraction means hiding the irrelevant details from the user to focus only on the essential details to increase efficiency thereby reducing complexity . In Java, abstraction is achieved using abstract classes and methods.

The only reason for declaring a class as abstract is so that it can’t be instantiated . There are situations where you will have common functionality that is shared between a number of classes, but by itself that common functionality does not represent an object or represents an incomplete object.